Tronc is investigating Los Angeles Times publisher Ross Levinsohn after he was accused of encouraging a “frat boy atmosphere” in past jobs over two decades.

Among the accusations, in a story by David Folkenflik, a media writer for NPR, Levinsohn was a defendant in two sexual harassment lawsuits over a two-decade career that included stops at Yahoo, News Corp. (which owns The Post), AltaVista and other internet-related ventures.

“This week, we became aware of allegations that Ross Levinsohn acted inappropriately. We are immediately launching an investigation so that we have a better understanding of what’s occurred,” the Tronc statement read.

“At Tronc, we expect all employees to act in a way that supports a culture of diversity and inclusion. We will take appropriate action to address any behavior that falls short of these expectations.”

The story comes at a delicate time for the LA Times, which has been covering some of the explosive sexual harassment scandals that have rocked Hollywood in recent months.

A spokesman for Levinsohn declined to comment — but in the NPR piece, Levinsohn called the allegations “lies.”